@misc{indiciae83bf84be79a6, title = {Human EEG response to beta-endorphin.}, author = {A Pfefferbaum and P A Berger and G R Elliott and J R Tinklenberg and B S Kopell and J D Barchas and C H Li}, year = {1979}, doi = {10.1016/0165-1781(79)90031-3}, url = {https://pubmed.ncbi.nlm.nih.gov/298341/}, note = {Source identifier: 298341} }